Analysis Bracket Up

[Hugo Ribeiro]

Dear all,

I searched throughout the documentation and the repository but I didn't
find what I am looking for. I want to use analysis bracket up the staves
like the example I am attaching. When I use \startGroup and \stopGroup
it only displays the brackets in the bottom of the staff. I tried the
ligatures ( \[ \] ) but the output is not what I want. Any solution?

Thanks

p.s. This is an example from the book about Counterpoint from Kent
Kennan, Chapter 10, example 13. The other one is the lilypond output. In 
the end is the code.

cap10ex13.ly
Description: application/extension-ly